Hair drug testing: Many street drugs (or their breakdown products in the body) are absorbed into the hair. A sample of hair can be tested for recent drug use. Hair analysis: Testing of hair for toxic exposures, such as lead or mercury poisoning.
Gas Water Heater, water not hot enough-Thermostat or Sediment. The dip tube probably disintigrated. The dip tub sends cold water to the bottom of the tank for heating when its heated it rises to the top of the tank. Its possible that the dip tube broke of and now you have cold water mixing with the hot water on top.
Shut the power off to your water heater while you are installing the expansion tank IF YOUR WATER HEATER IS ELECTRIC. However, if you have a gas water heater, UNLESS YOU KNOW EXACTLY HOW TO TURN THE GAS SUPPLY ON AND OFF, do NOT attempt to do so.upiterimages/liquidlibrary/Getty Images. Heat causes expansion. And, when water is heated and expands, if it doesn't have an expansion tank to catch the overflow, it can cause pipes to leak or even burst. Damage to your water heater is also possible.